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wasm: Create ParseError type

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Brian Carroll 2022-05-22 10:42:30 +01:00
parent 66c78ceed5
commit c16a5ad8ae
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7 changed files with 72 additions and 40 deletions
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10
compiler/gen_wasm/src/wasm_module/opcodes.rs
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@ -1,4 +1,4 @@
use super::parse::{Parse, SkipBytes};
use super::parse::{Parse, ParseError, SkipBytes};
#[repr(u8)]
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
@ -259,13 +259,17 @@ fn immediates_for(op: OpCode) -> Result<OpImmediates, String> {
}
impl SkipBytes for OpCode {
fn skip_bytes(bytes: &[u8], cursor: &mut usize) -> Result<(), String> {
fn skip_bytes(bytes: &[u8], cursor: &mut usize) -> Result<(), ParseError> {
use OpImmediates::*;
let opcode_byte: u8 = bytes[*cursor];
let opcode: OpCode = unsafe { std::mem::transmute(opcode_byte) };
let immediates = immediates_for(opcode)?; // will return Err if transmute was invalid
// will return Err if transmute was invalid
let immediates = immediates_for(opcode).map_err(|message| ParseError {
message,
offset: *cursor,
})?;
match immediates {
NoImmediate => {